1. Downloadmysql-cluster 7.3.7
http://dev.mysql.com/downloads/cluster/
2. Environment cleanup and installation
1) Clean up the mysql service that comes with CentOS6.5. I don’t have to execute the first command. If it doesn’t work on other systems, it is recommended to execute it
# yum -y remove mysql # rpm -qa | grep mysql* # rpm -e --nodeps mysql-libs-5.1.71-1.el6.x86_64
2) Environment preparation
Create folders (divided as follows 3 classes to create corresponding folders)
##
存储节点:# mkdir /var/lib/mysql/data 管理节点:# mkdir /var/lib/mysql-cluster SQL节点:可不用 文件夹授权 进程DIR:# mkdir /var/run/mysqld
使用如下的命令来变更权限保证可写入: # chmod -R 1777 /var/lib/mysql # chmod -R 1777 /var/run/mysqld # chmod -R 1777 /var/lib/mysql-cluster
3) Install mysql-cluster
Unzip it firstMySQL-Cluster-gpl-7.4.2-1.el6.x86_64.rpm-bundle.tar
# tar xvf MySQL-Cluster-gpl-7.4.2-1.el6.x86_64.rpm-bundle.tar
# rpm -ivh MySQL-Cluster-server-gpl-7.3.4-1.el6.x86_64.rpm # rpm -ivh MySQL-Cluster-client-gpl-7.3.4-1.el6.x86_64.rpm
--------------------------------------------------------------------------------------------------------------------- A RANDOM PASSWORD HAS BEEN SET FOR THE MySQL root USER ! You will find that password in '/root/.mysql_secret'. You must change that password on your first connect, no other statement but 'SET PASSWORD' will be accepted. See the manual for the semantics of the 'password expired' flag. Also, the account for the anonymous user has been removed. In addition, you can run: /usr/bin/mysql_secure_installation which will also give you the option of removing the test database. This is strongly recommended for production servers. -----------------------------------------------------------
1) Execute the following command:
# cd /var/lib/mysql-cluster # vi config.ini
[computer] Id=mgr-server-01 HostName=192.168.100.218 [mgm default] datadir=/var/lib/mysql-cluster [mgm] HostName=192.168.100.218 NodeId=60 ExecuteOnComputer=mgr-server-01 PortNumber=1186 ArbitrationRank=2 [ndbd default] NoOfReplicas=2 DataMemory=500M IndexMemory=500M [ndbd] HostName=192.168.100.217 DataDir=/var/lib/mysql NodeId=1 [ndbd] HostName=192.168.100.218 DataDir=/var/lib/mysql NodeId=2 [mysqld] HostName=192.168.100.217 NodeId=81 [mysqld] HostName=192.168.100.218 NodeId=82
Modify the my.cnf file and add the following content:
[client] socket=/var/lib/mysql/mysql.sock [mysqld] max_connections=100 datadir=/var/lib/mysql socket=/var/lib/mysql/mysql.sock ndbcluster ndb-connectstring=192.168.100.218 [mysqld_safe] log-error=/var/log/mysqld.log #pid-file=/var/run/mysqld/mysqld.pid pid-file=/var/lib/mysql/mysqld.pid [mysql_cluster] ndb-connectstring=192.168.100.218
1) Start mysql-cluster
Before executing the initial startup, please confirm that the firewalls of the two machines are turned off (service iptables stop or set the firewall port to be passable. The two ports are communication port 1186 and data Port 3306)
Start the mgt console command for the first time: ndb_mgmd -f /var/lib/mysql-cluster/config.ini
Start the balancing node command: ndbd --initial
Start the data node command: defaults-file=/etc/my.cnf --explicit_defaults_for_timestamp &
Note that you need to monitor the entire console output during the startup process. If you find any
error messages, you need to solve them in time and solve them according to the contents of the error log. -------------------------------------------------- -------------------------------------------------- --------
If everything is normal, use the following command to open the Management console: ndb_mgm
Execute# show
Check whether each node has been fully started, as follows, each node has been connected , if there is a node that is not connected, you will see
ndb_mgm> show Connected to Management Server at: 192.168.100.218:1186 Cluster Configuration --------------------- [ndbd(NDB)] 2 node(s) id=1 @192.168.100.217 (mysql-5.6.21 ndb-7.4.2, Nodegroup: 0) id=2 @192.168.100.218 (mysql-5.6.21 ndb-7.4.2, Nodegroup: 0, *) [ndb_mgmd(MGM)] 1 node(s) id=60 @192.168.100.218 (mysql-5.6.21 ndb-7.4.2) [mysqld(API)] 2 node(s) id=81 @192.168.100.217 (mysql-5.6.21 ndb-7.4.2) id=82 @192.168.100.218 (mysql-5.6.21 ndb-7.4.2)
ndb_mgm> show Cluster Configuration -------------------- [ndbd(NDB)] 2 node(s) id=1 @192.168.100.217 (mysql-5.6.21 ndb-7.4.2, Nodegroup: 0) id=2 @192.168.100.218 (mysql-5.6.21 ndb-7.4.2, Nodegroup: 0, *) [ndb_mgmd(MGM)] 1 node(s) id=60 @192.168.100.218 (mysql-5.6.21 ndb-7.4.2) [mysqld(API)] 2 node(s) id=81 (not connected, accepting connect from 192.168.100.217) id=82 @192.168.100.218 (mysql-5.6.21 ndb-7.4.2)
When mysqld starts normally (you can use pgrep mysqld to obtain the process ID), we can use the following command to modify:
mysql -u root -p;
SET PASSWORD = PASSWORD('新密码');
hash value, so use the following method to obtain the passwordThe hash value of string
select password('111111');
SET PASSWORD = PASSWORD('*FD571203974BA9AFE270FE62151AE967ECA5E0AA');
It’s so depressing. After setting it up, you still have to use ciphertext for login, okay? Just use password After entering, use the following command to force the use of clear text to log in
use mysql; delete from user; grant all on *.* to root@'%' identified by "111111" with grant option; flush privileges; quit;
5. After the above steps are completed, test whether the cluster is working normally
1) Simple functional test
After entering mysql on 218, execute the following:
create database clustertest; use clustertest; CREATE TABLE testtable(Count INT) ENGINE=NDBCLUSTER;
2) Test whether the data can be synchronized in disaster recovery situations (if a database is stopped, will the lost data be automatically replenished when it is restarted)
Stop 217 mysql service, executed on 218
insert into testtable values (1);
启动217的mysql服务,使用show确认217的数据库节点已经连接上了,执行如下语句
select * from testtable;
如果发现有数据,则表示功能完备
6、关闭Cluster:(需要严格按照次序执行)
关闭数据节点:# mysqld stop (SQL节点可以用mysqladmin shutdown或别的方式关闭。)
在管理节点上执行:# ndb_mgm -e shutdown
将安全的关闭管理节点和数据节点。
关闭后使用如下的进程检测命令查看一下是否退出来了:
# pgrep mysqld # ps aux | grep nbdb
如果没有,找到对应的pid进行kill 操作即可
kill -9 进程号
7、再次启动Cluster方案:
启动整个cluster的次序,注意,一些语句已经减去了初始化的内容:
ndb_mgmd -f /var/lib/mysql-cluster/config.ini ndbd mysqld_safe --defaults-file=/etc/my.cnf --explicit_defaults_for_timestamp &
备注:
1、mysql安装后,默认会自动启动的,每次启动cluster的时候,都需要先把mysql的服务关闭,太麻烦,于是可以执行如下命令(我出手有点狠):
chkconfig --level 123456 mysql off
2、防火墙问题,偷个懒,我懒得去一一开放端口,干脆把防火墙直接关了
chkconfig --level 123456 mysql off
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